Officials are probing how a 51-year-old highway bridge came to collapse in the Italian port city of Genoa yesterday, killing at least 26 people and injuring 16 others as it sent dozens of vehicles tumbling into a heap of concrete and twisted steel.

Killer Sean Price has pleaded guilty to breaching a sex offender supervision order when he raped a woman two days after murdering Melbourne schoolgirl Masa Vukotic.

Price, 33, is already serving a life sentence for stabbing Ms Vukotic in a park in Doncaster in March 2015 when she was 17-years-old.

Two days later while still on the run, he raped a woman in a bookstore, triggering a charge of breaching a court order because he was already a registered sex offender.

Masa Vukotic was 17 years old when she was murdered in a Doncaster park in March 2015. (AAP) (AAP)Price pleaded guilty to breaching a sex offender supervision order when he raped a woman two days after murdering Ms Vukotic. (9NEWS) ()

Price had told his Victorian Legal Aid lawyer he had intended to plead guilty.

But once inside court today, flanked by four guards and held behind a glass security screen, he changed his course, leaving his victim visibly shaking.

“I was going to say guilty as Daniel Andrews' wife,” he told Judge Meryl Sexton when asked to enter a plea to the charge.